array := ["a-phone", "b-phone", "a-pad"]

# Set
set contains "a-phone"
set["b-phone"]
set contains abs(-6)
set contains item if {
    some item in array
    endswith(item,"-phone")
}

# Object
object["x-1"] := "a-phone"
obejct["x-2"] := max([1,2,3])
object[key] := {
    some index,item in array
    endswith(item,"-phone")
    key:= sprintf("x-%v",[index])
}
